91016435890 has 16 divisors (see below), whose sum is σ = 163887099840. Its totient is φ = 36393793200.

The previous prime is 91016435863. The next prime is 91016435899. The reversal of 91016435890 is 9853461019.

It is a self number, because there is not a number n which added to its sum of digits gives 91016435890.

It is not an unprimeable number, because it can be changed into a prime (91016435899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1567710 + ... + 1624729.

It is an arithmetic number, because the mean of its divisors is an integer number (10242943740).

Almost surely, 2^91016435890 is an apocalyptic number.

91016435890 is a deficient number, since it is larger than the sum of its proper divisors (72870663950).

91016435890 is a wasteful number, since it uses less digits than its factorization.

91016435890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195297.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 91016435890 in words is "ninety-one billion, sixteen million, four hundred thirty-five thousand, eight hundred ninety".